What are some characteristics of theories ?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

What is the lowest number energy level where a d sublevel is found